linux-kernel - Re: [PATCH 7/8] tty/serial: add arm64 semihosting earlycon

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Date:	Mon, 24 Mar 2014 11:38:21 +0000
From:	Catalin Marinas <catalin.marinas@....com>
To:	Rob Herring <robherring2@...il.com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>,
	Russell King <linux@....linux.org.uk>,
	Will Deacon <Will.Deacon@....com>,
	"x86@...nel.org" <x86@...nel.org>, Arnd Bergmann <arnd@...db.de>,
	Rob Herring <robh@...nel.org>
Subject: Re: [PATCH 7/8] tty/serial: add arm64 semihosting earlycon

On Fri, Mar 21, 2014 at 09:08:47PM +0000, Rob Herring wrote:
> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index 81bdd52..e96e2ba 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -888,6 +888,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
>  		uart[8250],mmio,<addr>[,options]
>  		uart[8250],mmio32,<addr>[,options]
>  		pl011,<addr>
> +		smh
>  			Start an early, polled-mode console on a serial port
>  			at the specified I/O port or MMIO address. 8250
>  			MMIO inter-register address stride is either 8-bit

Same comment as per a previous patch, "smh" does not take any parameters
at all here.

> --- /dev/null
> +++ b/drivers/tty/serial/earlycon-arm-semihost.c
> @@ -0,0 +1,44 @@
> +/*
> + * Copyright (C) 2012 ARM Ltd.
> + * Author: Catalin Marinas <catalin.marinas@....com>

Nitpick: author should be Mark Zyngier <marc.zyngier@....com> as per
commit 0492f72508184 (arm64: early_printk: add support for FastModel
console output)

-- 
Catalin
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